Problemset - Codeforces

Please, try EDU on Codeforces! New educational section with videos, subtitles, texts, and problems. ×

→ Pay attention

Before contest
Codeforces Round #655 (Div. 2)
6 days

→ Filter Problems

Difficulty: —

dsu

Add tag

Problems

#	Name
1370D	Odd-Even Subsequence binary search, dp, dsu, greedy, implementation	2000	x5078
1365D	Solve The Maze constructive algorithms, dfs and similar, dsu, graphs, greedy, implementation, shortest paths	1700	x7869
1361C	Johnny and Megan's Necklace binary search, bitmasks, constructive algorithms, dfs and similar, dsu, graphs	2500	x775
1344B	Monopole Magnets constructive algorithms, dfs and similar, dsu, graphs	2000	x4184
1335F	Robots on a Grid data structures, dfs and similar, dsu, graphs, greedy, matrices	2200	x1346
1332C	K-Complete Word dfs and similar, dsu, greedy, implementation, strings	1500	x9785
1305G	Kuroni and Antihype bitmasks, brute force, dp, dsu, graphs	3500	x193
1307F	Cow and Vacation dfs and similar, dsu, trees	3300	x229
1303F	Number of Components dsu, implementation	2800	x278
1290C	Prefix Enlightenment dfs and similar, dsu, graphs	2400	x920
1292A	NEKO's Maze Game data structures, dsu, implementation	1400	x9050
1278D	Segment Tree data structures, dsu, graphs, trees	2100	x2264
1276B	Two Fairs combinatorics, dfs and similar, dsu, graphs	1900	x2842
1263D	Secret Passwords dfs and similar, dsu, graphs	1500	x6629
1254E	Send Tree to Charlie combinatorics, dfs and similar, dsu, trees	3300	x100
1253F	Cheap Robot binary search, dsu, graphs, shortest paths, trees	2500	x641
1253D	Harmonious Graph constructive algorithms, dfs and similar, dsu, graphs, greedy, sortings	1700	x5152
1242B	0-1 MST dfs and similar, dsu, graphs, sortings	1900	x3748
1245D	Shichikuji and Power Grid dsu, graphs, greedy, shortest paths, trees	1900	x3468
1249B2	Books Exchange (hard version) dfs and similar, dsu, math	1300	x9504
1249B1	Books Exchange (easy version) dsu, math	1000	x12550
1236E	Alice and the Unfair Game binary search, data structures, dp, dsu	2500	x417
1220E	Tourism dfs and similar, dp, dsu, graphs, greedy, trees	2200	x1517
1209G1	Into Blocks (easy version) data structures, dsu, greedy, implementation, two pointers	2000	x1851
1209D	Cow and Snacks dfs and similar, dsu, graphs	1700	x4726
1217F	Forced Online Queries Problem data structures, divide and conquer, dsu, graphs, trees	2600	x236
1213G	Path Queries divide and conquer, dsu, graphs, sortings, trees	1800	x3051
1213F	Unstable String Sort data structures, dfs and similar, dsu, graphs, greedy, implementation, strings	2100	x1426
1184E3	Daleks' Invasion (hard) data structures, dsu, graphs, trees	2400	x281
1176E	Cover it! dfs and similar, dsu, graphs, shortest paths, trees	1700	x4720
1166F	Vicky's Delivery Service data structures, dsu, graphs, hashing	2400	x361
1167C	News Distribution dfs and similar, dsu, graphs	1400	x7812
1156E	Special Segments of Permutation data structures, divide and conquer, dsu, two pointers	2200	x1372
1156D	0-1-Tree dfs and similar, divide and conquer, dp, dsu, trees	2200	x1766
1140F	Extending Set of Points data structures, divide and conquer, dsu	2600	x370
1139C	Edgy Trees dfs and similar, dsu, graphs, math, trees	1500	x6769
1133F2	Spanning Tree with One Fixed Degree constructive algorithms, dfs and similar, dsu, graphs, greedy	1900	x1587
1120D	Power Tree dfs and similar, dp, dsu, graphs, greedy, trees	2500	x422
1130C	Connect brute force, dfs and similar, dsu	1400	x5428
1131F	Asya And Kittens constructive algorithms, dsu	1700	x3936
1131D	Gourmet choice dfs and similar, dp, dsu, graphs, greedy	2000	x2148
1107G	Vasya and Maximum Profit binary search, constructive algorithms, data structures, dp, dsu	2400	x593
1108F	MST Unification binary search, dsu, graphs, greedy	2100	x1374
1095F	Make It Connected dsu, graphs, greedy	1900	x2735
1081D	Maximum Distance dsu, graphs, shortest paths, sortings	1800	x2272
1055B	Alice and Hairdresser dsu, implementation	1300	x3439
1044D	Deduction Queries data structures, dsu	2400	x543
1051G	Distinctification data structures, dsu, greedy	2900	x118
1042F	Leaf Sets data structures, dfs and similar, dsu, graphs, greedy, sortings, trees	2400	x813
1039C	Network Safety dfs and similar, dsu, graphs, math, sortings	2200	x918
1027F	Session in BSU binary search, dfs and similar, dsu, graph matchings, graphs	2400	x746
1023F	Mobile Phone Network dfs and similar, dsu, graphs, trees	2600	x501
1012E	Cycle sort dsu, math	3100	x127
1012B	Chemical table constructive algorithms, dfs and similar, dsu, graphs, matrices	1900	x2548
1009F	Dominant Indices data structures, dsu, trees	2300	x1536
990G	GCD Counting divide and conquer, dp, dsu, number theory, trees	2400	x792
986C	AND Graph bitmasks, dfs and similar, dsu, graphs	2500	x1296
982D	Shark brute force, data structures, dsu, trees	1900	x1625
979D	Kuro and GCD and XOR and SUM binary search, bitmasks, brute force, data structures, dp, dsu, greedy, math, number theory, strings, trees	2200	x1027
977E	Cyclic Components dfs and similar, dsu, graphs	1500	x8115
962G	Visible Black Areas data structures, dsu, geometry, trees	2800	x70
959B	Mahmoud and Ehab and the message dsu, greedy, implementation	1200	x6224
936E	Iqea data structures, dfs and similar, divide and conquer, dsu, shortest paths, trees	3400	x115
939D	Love Rescue dfs and similar, dsu, graphs, greedy, strings	1600	x4328
938G	Shortest Path Queries bitmasks, data structures, dsu, graphs	2900	x262
920F	SUM and REPLACE brute force, data structures, dsu, number theory	2000	x2705
920E	Connected Components? data structures, dfs and similar, dsu, graphs	2100	x2630
915F	Imbalance Value of a Tree data structures, dsu, graphs, trees	2400	x972
902B	Coloring a Tree dfs and similar, dsu, greedy	1200	x6627
901C	Bipartite Segments binary search, data structures, dfs and similar, dsu, graphs, two pointers	2300	x795
899E	Segments Removal data structures, dsu, flows, implementation, two pointers	2000	x1466
896E	Welcome home, Chtholly data structures, dsu	3100	x343
891C	Envy data structures, dsu, graphs	2300	x1045
886C	Petya and Catacombs dsu, greedy, implementation, trees	1300	x4474
884E	Binary Matrix dsu	2500	x368
875F	Royal Questions dsu, graphs, greedy	2500	x660
875B	Sorting the Coins dsu, implementation, sortings, two pointers	1500	x4229
870E	Points, Lines and Ready-made Titles dfs and similar, dsu, graphs, trees	2300	x684
873F	Forbidden Indices dsu, string suffix structures, strings	2400	x544
859E	Desk Disorder combinatorics, dfs and similar, dsu, graphs, trees	2100	x1119
843A	Sorting by Subsequences dfs and similar, dsu, implementation, math, sortings	1400	x4311
817D	Imbalanced Array data structures, divide and conquer, dsu, sortings	1900	x2025
813F	Bipartite Checking data structures, dsu, graphs	2500	x344
811E	Vladik and Entertaining Flags data structures, dsu, graphs	2600	x454
788B	Weird journey combinatorics, constructive algorithms, dfs and similar, dsu, graphs	2100	x1692
771A	Bear and Friendship Condition dfs and similar, dsu, graphs	1500	x7976
778C	Peterson Polyglot brute force, dfs and similar, dsu, hashing, strings, trees	2500	x622
776D	The Door Problem 2-sat, dfs and similar, dsu, graphs	2000	x2719
765D	Artsem and Saunders constructive algorithms, dsu, math	1700	x2108
766D	Mahmoud and a Dictionary data structures, dfs and similar, dp, dsu, graphs	2000	x2115
763E	Timofey and our friends animals data structures, divide and conquer, dsu	2900	x266
763A	Timofey and a tree dfs and similar, dp, dsu, graphs, implementation, trees	1600	x6612
755C	PolandBall and Forest dfs and similar, dsu, graphs, interactive, trees	1300	x6272
750H	New Year and Snowy Grid dfs and similar, dsu, graphs, interactive	3500	x63
741B	Arpa's weak amphitheater and Mehrdad's valuable Hoses dfs and similar, dp, dsu	1600	x3846
733F	Drivers Dissatisfaction data structures, dsu, graphs, trees	2200	x737
731C	Socks dfs and similar, dsu, graphs, greedy	1600	x4664
723F	st-Spanning Tree dsu, graphs, greedy, implementation	2300	x1045
723D	Lakes in Berland dfs and similar, dsu, graphs, greedy, implementation	1600	x4916
722C	Destroying Array data structures, dsu	1600	x4996

←